Hands On DarkBASIC Pro - Digital Skills

Recommendations

Info

FIG-32.22 The SET OBJECT FILTER Statement LISTING-32.10 Activity 32.18 In your last program, remove all references to the flagmag.bmp file. Create a tiled effect on the cube by using the SCALE OBJECT TEXTURE statement with the Uscale and Vscale parameters both set to 2. How is the DETAIL MAPPING image on the cube affected by the tiling? The SET OBJECT FILTER Statement Using the SET OBJECT FILTER Statement Different methods of texturing can be specified using the SET OBJECT FILTER statement. The differences achieved have little obvious effect on the visible appearance of the textured object itself, but modify the algorithm used to create that texture. The statement has the format shown in FIG-31-22. In the diagram: SET OBJECT FILTER objno filterflag objno is an integer value specifying the object whose texture is to be filtered. filterflag is 0, 1, or 2 0 - always uses the original image to texture (it never uses the smaller images created by mipmapping). 1 - no smoothing is used. 2 - uses linear filtering. The program in LISTING-32.10 creates 3 spheres, each textured using one of the filter options. You may see a slight difference in the appearance of the spheres as they move off into the background and reduce in size. REM *** Set screen resolution *** SET DISPLAY MODE 1280,1024,32 REM *** Load image used as texture *** LOAD IMAGE "grid8by8.bmp",1,1 REM *** Create three spheres *** MAKE OBJECT SPHERE 1 ,40 MAKE OBJECT SPHERE 2 ,40 MAKE OBJECT SPHERE 3 ,40 REM *** Texture each sphere *** TEXTURE OBJECT 1,1 TEXTURE OBJECT 2,1 TEXTURE OBJECT 3,1 REM *** Set different filter for each sphere *** SET OBJECT FILTER 1, 0 SET OBJECT FILTER 2, 1 SET OBJECT FILTER 3, 2 REM *** Position spheres *** POSITION OBJECT 1,-42,0,0 POSITION OBJECT 2,0,0,0 POSITION OBJECT 3,42,0,0 , continued on next page DarkBASIC Pro: Texturing 813
LISTING-32.10 (continued) Using the SET OBJECT FILTER Statement Summary REM *** Moves spheres *** FOR z = 1 TO 4000 MOVE OBJECT 1,1 MOVE OBJECT 2,1 MOVE OBJECT 3,1 WAIT 10 NEXT z REM *** End program *** WAIT KEY END Activity 32.19 Type in and test the program given above (texture10.dbpro). � Texturing involves mapping an image onto the surface of a 3D object. � Use LOAD IMAGE to load any image which is to be used to texture a 3D object. � Use TEXTURE OBJECT to map an image to an object. � Images stretch automatically to fit the surface of an object. � On a cube or box the image is repeated on each face. � On other 3D objects, the image appears only once. � Mipmaps are smaller versions of the original image which are used to speed up mapping when a textured object becomes much smaller than the original image. � Tiling is the application of an image multiple times to the same surface. � Use SCALE OBJECT TEXTURE to create a tiled texture. � To create a seamless tile, make sure the opposite edges are complementary. � Use PLAY ANIMATION TO IMAGE and TEXTURE OBJECT to display a video on the surface of an object. � Use SET OBJECT TEXTURE to specify how an image is mapped to a surface. � Use SCROLL OBJECT TEXTURE to create an offset mapping of the image on a 3D surface. � Use SET OBJECT TRANSPARENCY to make black areas of a 3D object disappear. � Use SET DETAIL MAPPING ON to apply a second image to an already textured object. � Use SET OBJECT FILTER to modify how an image is filtered when being mapped onto an object. 814 DarkBASIC Pro: Texturing
Page 1 and 2:
Hands On DarkBASIC Pro A Self-Study
Page 3 and 4:
Copyright © Alistair Stewart 2006
Page 5 and 6:
The TURN OBJECT Statement . . . . .
Page 7 and 8:
The YROTATE CAMERA Statement . . .
Page 9 and 10:
Chapter 35 Meshes and Limbs Meshes.
Page 11 and 12:
The OBJECT IN SCREEN Statement . .
Page 13 and 14:
The MAKE OBJECT COLLISION BOX State
Page 15 and 16:
Adding MoveElevator() . . . . . . .
Page 17 and 18:
The RANDOMIZE MATRIX Statement . .
Page 19 and 20:
The MAKE MEMBLOCK FROM SOUND Statem
Page 21 and 22:
The TRANSPOSE MATRIX4 Statement . .
Page 23 and 24:
Networking the Game . . . . . . . .
Page 25 and 26:
Acknowledgements I would like to th
Page 27 and 28:
Syntax Diagrams make only a half-he
Page 29 and 30:
The 3D World Introduction The Coord
Page 31 and 32:
FIG-30.4 Points Determining the Pos
Page 33 and 34:
FIG-30.6 Rotation A Cuboid is Rotat
Page 35 and 36:
FIG-30.13 Varying the Polygons in a
Page 37 and 38:
FIG-30.17 Lights Surface Normals FI
Page 39 and 40:
� Space within the 3D world is me
Page 41 and 42:
3D Primitives Introduction FIG-31.1
Page 43 and 44:
FIG-31.5 The MAKE OBJECT BOX Statem
Page 45 and 46:
FIG-31.9 The MAKE OBJECT CONE State
Page 47 and 48: FIG-31.13 Creating a Triangle Objec
Page 49 and 50: FIG-31.16 The MOVE OBJECT Statement
Page 51 and 52: FIG-31.19 Possible Rotations about
Page 53 and 54: LISTING-31.3 Rotating an Object abo
Page 55 and 56: FIG-31.29 The PITCH OBJECT Statemen
Page 57 and 58: FIG-31.32 The POINT OBJECT Statemen
Page 59 and 60: LISTING-31.6 (continued) Local Axes
Page 61 and 62: LISTING-31.7 Resizing an Object REM
Page 63 and 64: Copying a 3D Object FIG-31.43 The C
Page 65 and 66: FIG-31.46 FIG-31.47 The OBJECT POSI
Page 67 and 68: FIG-31.49 The OBJECT ANGLE Statemen
Page 69 and 70: LISTING-31.11 (continued) Switching
Page 71 and 72: FIG-31.53 The SET GLOBAL OBJECT CRE
Page 73 and 74: Merging Primitives Introduction FIG
Page 75 and 76: FIG-31.58 As you've just discovered
Page 77 and 78: Solutions Activity 31.1 No solution
Page 79 and 80: Activity 31.20 The duplicated cube
Page 81 and 82: 796 DarkBASIC Pro: 3D Primitives
Page 83 and 84: Adding Texture Introduction FIG-32.
Page 85 and 86: FIG-32.3 An Image with Added Mipmap
Page 87 and 88: FIG-32.5 Floor Texturing FIG-32.6 T
Page 89 and 90: Seamless Tiling FIG-32.10 A Visible
Page 91 and 92: FIG-32.12 The PLAY ANIMATION TO IMA
Page 93 and 94: LISTING-32.6 (continued) Using the
Page 95 and 96: The SET OBJECT TRANSPARENCY Stateme
Page 97: LISTING-32.9 Using a Secondary Text
Page 101 and 102: FIG-32.24 A Transparent Cube Activi
Page 103 and 104: FIG-32.27 The FADE OBJECT Statement
Page 105 and 106: Images with an Alpha Channel Introd
Page 107 and 108: Creating a Complex 3D Shape Introdu
Page 109 and 110: The Code LISTING-32.15 Drawing the
Page 111 and 112: LISTING-32.15 (continued) Drawing t
Page 113 and 114: Sky Spheres FIG-32.32 Using a Sky S
Page 115 and 116: Summary To cure the problem of an i
Page 117 and 118: REM *** Create and texture plain ob
Page 119: TEXTURE OBJECT GroundObj,CobbleImg
show all

Hands On DarkBASIC Pro - Digital Skills

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?